Yen-I G. Chen, MD

Medicare activity in 2024

Official CMS public-use data for Yen-I G. Chen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)136 services
2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)122 services
3. Administration of influenza virus vaccine (G0008)39 services
4. Influenza vaccine split virus, preservative free (90662)38 services
5. Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use (90677)33 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol75%
• High blood pressure61%
• Arthritis35%
• Diabetes23%
• Ischemic heart disease19%
• Anxiety19%

Hospitals where Yen-I G. Chen works

Medicare's Facility Affiliation Data lists Yen-I G. Chen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Wellstar Cobb Medical CenterAustell, GA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 110143
• Wellstar Kennestone Regional Medical CenterMarietta, GA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 110035
• Wellstar North Fulton Medical CenterRoswell, GA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 110198

Practice locations

Addresses where Yen-I G. Chen is enrolled with Medicare (CMS data updated October 2, 2026).

• 1010 Johnson Ferry RdMarietta, GA 30068 (770) 579‑7900

Group practices

Medicare enrollment lists Yen-I G. Chen as a member of this group (CMS data updated October 2, 2026).

• Wellstar Medical Group LLC3,093 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Georgia →

Other family doctors in Marietta

Clinicians with the same Medicare primary specialty in Marietta, GA — not a recommendation.

• Stephanie Stieglitz, MD
• Feroz Lalani
• Antonique Peterson, DO
• Christopher L. Stevens, MD
• Tyra Harris
• David M. Clifford, MD
• Suhas Samuel, MD
• Irshad Syed, MD

All family doctors in Marietta →

Other clinicians in Wellstar Medical Group LLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Asif A. Saberi, MD
• John C. Morgan, MD
• Manu Malepati, MD
• Raisa C. Martinez, MD
• Joseph C. Holjencin, MD
• Erin M. Tant

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians